| 摘要 |
PROBLEM TO BE SOLVED: To provide: a negative electrode active material arranged by use of a titanium niobium oxide, which enables the control of the crystallite size of a titanium niobium oxide within a proper range while effectively suppressing the production of an impurity or the remanence thereof, and which can exhibit superior charge and discharge characteristics when used as a negative electrode of a lithium ion battery; and a method for manufacturing such a negative electrode active material.SOLUTION: A method for manufacturing a titanium niobium oxide negative electrode active material with carbon supported on the surface of TiNbOcomprises the steps of: (I) preparing a suspension containing a particular amount of niobium hydroxide, a titanium compound and hydrogen peroxide, in which the mole ratio of the hydrogen peroxide to niobium is a particular value; (II) subjecting the resultant suspension to a hydrothermal reaction at 35-250°C and then, performing a solid-liquid separation to obtain a solid content; (III) rinsing the resultant solid content with a particular amount of rinse water; (IV) baking the solid content thus rinsed at a particular temperature into a titanium niobium oxide; and (V) causing the resultant titanium niobium oxide to support a particular amount of a particular carbon.SELECTED DRAWING: None |
